To use marker bed,seam interval,coal and strata combination features,physical property and coal quality features multiple correlations,comprehensi vely correlated coal seams and strata in Quandian minefield.

Analyzed the structure feature of the Quandian minefield,the paper expounded fault and fold distribution,discussed structural evolution of the minefield and structural especially the faults' influence on No.

Analyzed the structure feature of the Quandian minefield,the paper expounded fault and fold distribution,discussed structural evolution of the minefield and structural especially the faults influence on No.

The mian mineable coal seam in the Xiadian minefield,Ruzhou coalfield is the II1 coal.

Applying the principle and method of sedimentology and coal geology,based on the detailed coring data analysis,the sedimentary environment and evolution history of coals formed in the Liudian minefield,Huaibei coalfield were analyzed.

Thoughts on Privatization Perform at Baodian Coal Mine;

Sedimentary facies of Member 6 oil-bearing unit of the Triassic Yanchang Formation and its controlling rule on oil distribution in the Yaodian Oilfield,Ordos Basin;

Micro-fractures and high permeability channel are the main factor controlling injected water move quickly in accordance with the behavior well test of Wang 84 well group in water injection experimental region in Yaodian oilfield.